JP5259892B1 - Endoscope - Google Patents

Abstract

  The endoscope 2 of the present embodiment is configured in a tubular shape using a conductive distal end member 21 made of resin, and a distal end side that is fitted and fixed to the distal end rigid member 21 and having conductivity. Then, the channel tube connecting member 22 having the stepped portion 40 provided on a part of the outer peripheral surface in the longitudinal direction and the rear end side of the distal end hard member 21 configured in a cylindrical shape using a conductive member. It is a bending piece member arranged immediately after, has a protruding portion 41 that protrudes toward the inner peripheral surface side and elastically deforms toward the inner peripheral surface side, accommodates the channel tube connecting member 22 therein, and the distal end hard member 21 The protrusion 41 has a bending piece member 23 that comes into contact with and is brought into contact with the outer peripheral surface of the channel tube connecting member 22 when being fixed to.

Description

  The present invention relates to an endoscope provided with an insertion channel in an insertion portion.

  Conventionally, endoscopes have been widely used in the medical field and the like. Endoscopes are desired to have a small diameter in order to reduce patient pain during examination. In particular, it is indispensable to reduce the diameter of the distal end of a transnasal endoscope that performs treatment / treatment by inserting the insertion portion nasally from the nose.

  Treatment / treatment is performed by inserting a treatment tool such as forceps through an insertion channel provided in the insertion portion of the endoscope.

  However, in an endoscope in which the distal end hard member, which is the main constituent member of the distal end portion, is made of metal, when a high frequency treatment instrument is inserted into the insertion channel and treatment is performed, the high frequency output of the high frequency treatment instrument is caused. Leakage current may flow to the patient through the hard tip member.

  Therefore, in the prior art, an endoscope is proposed in which an insulating tip cover is configured to cover a metal tip hard member, but the tip outer diameter increases by the thickness of the tip cover. In other words, it becomes an impediment to reducing the diameter of the tip.

  In addition, when the image sensor is fixed to the metal tip (regardless of the presence or absence of the tip cover), leakage current at the time of high-frequency treatment may flow to the image sensor via the metal part of the tip member. As a result, noise may occur in the output signal of the image sensor.

  In view of this, an endoscope has been proposed in which the distal end hard member is made of resin to reduce the outer diameter of the distal end and to make it difficult for leakage current caused by high-frequency output to flow through the imaging element.

For example, Japanese Patent Laid-Open No. 2006-122498 discloses a hard tip member made of resin, a metal connection pipe fixed to the hard tip member, and soldered to the rear end of the connection pipe. A bending portion that is electrically connected to the connection pipe, and a leakage current caused by the high-frequency output of the high-frequency treatment instrument is caused in the bending portion via the connection pipe. The structure regarding the endoscope comprised so that it may flow through the ground member of insertion parts, such as a node ring, is described.
However, in the endoscope described in Japanese Patent Application Laid-Open No. 2006-122498, the rear end portion of the connection pipe is fixed to the inner surface of the most advanced node ring by soldering. If the solder is peeled off, the connection pipe and the node ring cannot be reliably connected to each other, and the node ring may come off from the tip end body. For this reason, since it is necessary to provide a means for preventing the node ring from coming off, it becomes a factor that the outer diameter of the tip body becomes large.

  In addition, the endoscope described in Japanese Patent Application Laid-Open No. 2006-122498 has a configuration in which a connection pipe is fixed to the distal end hard member, and a node ring is soldered and fixed to the connection pipe. Assembling work of the hard member is difficult, and since the structure in which the distal end hard member and the node ring cannot be removed, the repairability is not good.

  Furthermore, a conventional endoscope in which the distal end hard member is made of metal and the distal end hard member is covered with the distal end cover is usually fixed to the distal end rigid member by screwing the most distal node ring with a screw or the like. However, in this configuration, the outer diameter is large due to the tip cover, fixing screws, etc. Thus, it is difficult to reduce the diameter of the distal end hard member. Further, there is a possibility that a leakage current flows to the image sensor provided in the hard tip member, and as a result, noise is generated in an output signal from the image sensor.

  Therefore, the present invention has been made in view of the above problems, and provides an endoscope that can reduce the diameter of the distal end hard member and can reliably conduct the bending portion to the bending piece. For the purpose.

An endoscope according to an aspect of the present invention has a communication hole for an insertion channel, a distal end hard member made of resin, and a distal end side is fitted and fixed in the communication hole of the distal end hard member, and a rear end The tube tube connecting member configured in a cylindrical shape using a conductive member, the side of which is connected to the insertion channel tube, and the rear end side of the distal end hard member with the channel tube connecting member housed inside fixed immediately, and the bay Kyokukoma member configured into a cylindrical shape by using a member having conductivity, provided on one of the peripheral surface of the channel tube connecting member and the bending piece member, toward the other circumferential surface resiliently protrudes have a protrusion which conducts in contact with the other circumferential surface when the channel tube connecting member housed therein and fixed to the distal end rigid member.

1 is a block diagram showing an overall configuration of an endoscope system according to a first embodiment of the present invention. FIG. 2 is a cross-sectional view taken along the line AA of the distal end hard member of the endoscope of FIG. 1. FIG. 3 is a cross-sectional view taken along line BB in FIG. 2 for explaining the configuration of the main part of the endoscope according to the first embodiment. It is the disassembled perspective view which decomposed | disassembled the front-end | tip hard member of FIG. 3, a channel tube connection member, and the most advanced bending piece member. It is a disassembled perspective view at the time of seeing from the back of the bending piece member of FIG. It is sectional drawing which shows the layout of the protrusion part in a front-end | tip part, and an imaging device. It is explanatory drawing for demonstrating the effect | action of the endoscope which concerns on 1st Embodiment. It is the disassembled perspective view which decomposed | disassembled the channel tube connection member and the most advanced bending piece member of the endoscope which concerns on the 2nd Embodiment of this invention. It is an enlarged view which shows the structure of the protrusion part and step part of FIG. It is sectional drawing of the front-end | tip part of the conventional endoscope.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

(First embodiment)
FIG. 1 is a block diagram showing an overall configuration of an endoscope system including an endoscope according to the first embodiment of the present invention.

As shown in FIG. 1, the endoscope system 1 of the present embodiment includes an endoscope 2, a light source device 3, a video processor 5, and a color monitor 6.
The endoscope 2 includes an insertion portion 7 and an operation portion 8 in which the insertion portion 7 is extended. A universal cord 9 extending from the operation portion 8 is connected to the light source device 3 via a scope connector 10. Connected. In addition, an electrical connector at one end of the scope cable 4 is detachably connected to the scope connector 10. The electrical connector at the other end of the scope cable 4 is connected to the video processor 5.

  The insertion portion 7 includes a distal end portion 11 that is a distal end rigid portion, a bending portion 12, and a flexible tube portion 13 in order from the distal end. A distal end opening 12a, an observation window 13a, two illumination windows 14, and an observation window cleaning nozzle 15a are disposed on the distal end surface of the distal end portion 11.

  An imaging device 50 (see FIG. 2) built in the distal end portion 11 is disposed on the back side of the observation window 13a. A light guide bundle 32 (see FIG. 3) that transmits illumination light from the light source device 3 and that passes through the inside of the universal cord 9 from the distal end portion 11 is provided on the back side of the two illumination windows 14. .

  The observation window cleaning nozzle 15a is connected and fixed to an air / water supply tube 15A that is inserted from the distal end portion 11 into the universal cord 9 through a connection pipe (not shown). The air / water supply tube 15 </ b> A is connected to the air / water supply tank and the compressor, which are not shown, and the light source device 3 side.

  The operation unit 8 includes a forceps port 12b disposed on the lower side, a grip unit 16, two bending operation units 17 provided on the upper side, an air / water supply control unit 18, and a suction control unit. 19 and a switch unit 20 mainly composed of a plurality of switches 20a for operating the imaging function. The forceps port 12 b of the operation unit 8 and the distal end opening 12 a of the insertion unit 7 constitute an opening of an insertion channel disposed in the insertion unit 7.

Next, the configuration of the distal end portion 11 of the endoscope 2 according to the present embodiment will be described with reference to FIGS.
As shown in FIGS. 2 to 5, the distal end portion 11 of the endoscope 2 according to the present embodiment includes a distal end rigid member 21 which is a main component of the distal end portion 11, a channel tube connecting member 22, a bending piece. And a member 23.

The distal end hard member 21 constitutes a distal end portion body made of resin, and has one opening 24 and three communication holes 25 to 27 as shown in FIG.
The opening 24 is an opening of a communication hole for the insertion channel 28. The two communication holes 25 are communication holes for inserting and arranging the glass lens 31 and the light guide bundle 32 constituting the illumination window 14 from the tip. The communication hole 26 is a communication hole for inserting and attaching the optical system of the imaging device 50 and the observation window 13a disposed in front of the optical system. The communication hole 27 is a communication hole to which the observation window cleaning nozzle 15a is attached, and a connection pipe (not shown) connected to the air / water supply tube 15A is fitted to the rear end side.

  And as shown in FIG. 3, the front end side of the channel tube connection member 22 is penetrated by the rear end side of the opening part 24 of the front-end | tip hard member 21, and it adheres and fixes using an adhesive agent. An insertion channel tube 29 is connected to the rear end side of the channel tube connecting member 22. The channel tube connecting member 22 is configured in a cylindrical shape using a conductive member.

  Transparent glass lenses 31 constituting the illumination window 14 are respectively fixed to the two communication holes 25 of the distal end hard member 21. Further, behind these glass lenses 31, tip portions of light guide bundles 32 arranged in the insertion portion 7 are respectively disposed. Thus, the illumination light transmitted from the light source device 3 by the light guide bundle 32 is irradiated to the front side of the distal end portion 11 through the glass lens 31 (illumination window 14).

  Further, an optical system (not shown) of the imaging device 50 and an observation window 13a disposed in front of the optical system are fixed to the communication hole 26 of the distal end hard member 21. Furthermore, a connection pipe (not shown) connected to the air / water supply tube 15A (see FIG. 2) is fitted into the communication hole 27 of the distal end rigid member 21, and an observation window cleaning nozzle 15a is attached to the distal end side.

  3 and 4, the bending piece member 23 is configured in a cylindrical shape using a conductive member, and is arranged immediately after the rear end side of the distal end hard member 21. Then, the channel tube connecting member 22 is fixed to the proximal end side of the distal end rigid member 21 in a state where the channel tube connecting member 22 is accommodated therein. The bending portion 12 includes a bending piece member 23 and is formed of a plurality of bending piece members. Although not shown, the bending portion 12 is bent vertically and horizontally by four operation wires and the bending operation portion 17 of the operation portion 8. It is supposed to be.

  Further, as shown in FIGS. 2 and 3, the outer periphery of the distal end hard member 21 and the plurality of bending piece members 23 in the bending portion 12 are integrally formed so as to form the outer shapes of the distal end portion 11 and the bending portion 12. A tip insertion rubber member 33 for covering is provided. The outer peripheral portion of the tip of the tip insertion rubber member 33 is fixed to the tip hard member 21 by a bobbin 34. Further, an adhesive 35 is applied so as to cover the outer periphery of the thread winding portion 34.

  In the endoscope 2 according to the present embodiment, the channel tube connecting member 22 is configured by providing a stepped portion 40 on a part of the outer peripheral surface in the longitudinal direction, and the bending piece member 23 is disposed on the inner peripheral surface side. It has a protrusion 41 that protrudes and elastically deforms on the inner peripheral surface side. When the channel tube connecting member 22 is accommodated inside and fixed to the distal end hard member 12, the protrusion 41 comes into contact with the stepped portion 40 and becomes conductive. It is configured to do.

  More specifically, as shown in FIGS. 3 to 5, the stepped portion 40 of the channel tube connecting member 22 is along a contact surface 40 a parallel to the central axis O and a direction orthogonal to the contact surface 40 a. And the formed wall portion 40b.

  On the other hand, the protruding portion 41 of the bending piece member 23 that comes into contact with the stepped portion 40 forms the protruding portion 41 by providing, for example, a U-shaped notch 41 a in the thin portion of the bending piece member 23, and this protruding portion It is made to plastically deform by pushing 41 to the inner peripheral surface side. The plastically deformed projecting portion 41 has an elastic force while being integrally formed with the bending piece member 23.

  Further, another protrusion 42 is provided on the peripheral surface facing the protrusion 41 to prevent the protrusion. The protruding portion 42 is configured in the same manner as the protruding portion 41. The projecting portion 42 accommodates the channel tube connecting member 22 therein and fixes the bending piece member 23 to the distal end hard member 21, and the locking groove portion 21 </ b> C ( (See FIG. 2).

  Next, the assembly procedure and operation of the main part of the tip part 11 having such a configuration will be described with reference to FIGS.

  The operator previously supplies the glass lens 31, the light guide bundle 32, the air / water supply tube 15 </ b> A, and the imaging device 50 described above with respect to the one opening 24 and the four communication holes 25 to 27 of the distal end hard member 21. Install it.

  Then, the operator inserts the distal end side of the channel tube connecting member 22 into the opening 24 of the distal end hard member 21 and adheres and fixes it using an adhesive or the like.

  At this time, the stepped portion 40 of the channel tube connecting member 22 is disposed so as to be exposed from the notch 21 </ b> B provided in the rear end portion 21 </ b> A of the distal end hard member 21. And the insertion channel tube 29 extended from the insertion part 7 is connected to the rear-end side of this channel tube connection member 22 with an adhesive agent etc.

  Thereafter, the operator inserts and installs the bending piece member 23 on the insertion portion 7 side into the rear end portion 21 </ b> A of the distal end hard member 21 while accommodating the channel tube connecting member 22 therein.

  In this case, the protrusion 41 of the bending piece member 23 is mounted while being positioned so as to be fitted along the notch 21 </ b> B of the distal end hard member 21. The rear end portion 21A and the bending piece member 23 may be attached using an adhesive or the like.

  When the bending piece member 23 is completely fitted and fixed to the rear end portion 21A of the distal end hard member 21, in this embodiment, as shown in FIG. 3, the protruding portion 41 of the bending piece member 23 is caused by its elastic force. The contact surface 40a of the channel tube connecting member 22 is contacted.

  At this time, the protrusion 41 is always urged in the direction of the arrow C shown in FIG. 3 by its elastic force, so that the contact with the contact surface 40a of the channel tube connecting member 22 can be reliably held. That is, the conduction state between the channel tube connecting member 22 and the bending piece member 23 can be ensured. The protruding portion 41 is configured to come into contact with the stepped portion 40 within a range in the longitudinal direction of the notch 21 </ b> B of the distal end hard member 21.

  Further, the other protruding portion 42 of the bending piece member 23 is locked to the locking groove portion 21 </ b> C (see FIG. 2) of the distal end hard member 21. In this case as well, the elastic force of the projecting portion 42 urges the locking groove portion 21C so that the locking state can be maintained.

  Then, after fixing the bending piece member 23 to the distal end hard member 21, the operator integrally attaches the outer periphery of the distal end hard member 21 and the plurality of bending piece members 23 in the bending portion 12 as shown in FIG. A tip insertion rubber member 33 is provided so as to cover, and the tip outer peripheral portion of the tip insertion rubber member 33 is fixed to the tip hard member 21 by the thread winding portion 34, and the adhesive 35 is further covered so as to cover the outer periphery of the thread winding portion 34. The tip portion 11 and the bending portion 12 are configured by applying the above.

  Now, it is assumed that a high-frequency treatment instrument (not shown) is inserted into the insertion channel 28 of the endoscope 2 of the present embodiment to perform treatment. At this time, if treatment is performed using a high-frequency treatment tool in a conductive liquid such as physiological saline, a leakage current of high-frequency output may occur.

  However, the endoscope 2 according to the present embodiment can cope with the leakage current of the high frequency power as described above, that is, the channel tube connecting member 22 formed of a conductive member as described above. The stepped portion 40 (contact surface 40a) and the protruding portion 41 of the bending piece member 23 made of a conductive member are in contact and are electrically connected.

  For this reason, as shown in FIG. 7, the leakage current of the high-frequency output is, as shown by the arrow in FIG. 7, the channel tube connecting member 22 → the contact surface 40a of the stepped portion 40 → the protruding portion 41 → the bending piece member 23 → Since it flows through a path such as a curved piece member at a later stage (not shown), the leakage current of the high frequency output can be released to the ground member of the insertion portion 7 such as the curved piece member 23.

  In addition, as shown in FIGS. 2 and 6, the endoscope 2 according to the present embodiment includes the imaging device 50 in a cross section in which the protruding portion 41 and the stepped portion 40 are perpendicular to the axis O direction of the distal end hard member 21. Is a configuration arranged at a position away from each other. For this reason, even if high-frequency power leakage current occurs, this high-frequency power leakage current hardly flows to the image sensor in the imaging device 50, and as a result, noise is generated in the output signal from the image sensor. Can be prevented.

In addition, the endoscope 2 according to the present embodiment is provided with the stepped portion 40 and the protruding portion 41, so that it not only secures a conductive state but also has a function of preventing a disconnection.
For example, it is assumed that, at the distal end portion 11 of the endoscope 2, the adhesive is peeled off due to aging or the like and the bending piece member 23 is detached from the distal end hard member 21.
However, in the endoscope 2 of the present embodiment, the protruding portion 41 of the bending piece member 23 contacts and is locked against the wall portion 40b of the channel tube connecting member 22 while sliding on the contact surface 40a. At the same time, the other protruding portion 42 of the bending piece member 23 is locked to the locking groove portion 21 </ b> C (see FIG. 2) of the distal end hard member 21.

  That is, at the same time that the protruding portion 41 is locked to the wall portion 40b, the other protrusion 42 is also locked to the locking groove portion 21C, thereby pulling it from the distal end hard member 21 of the bending piece member 23 (the leading end). It is a direction away from the hard member 21 and can be prevented from moving in the rear end side direction (right direction in FIG. 3) of the front end hard member 21, that is, the bending piece member 23 is detached from the front end portion 11. Can be prevented, and a conduction state can be maintained.

  In the present embodiment, the notch 21B of the distal end hard member 21, the stepped portion 40 of the channel tube connecting member 22, and the protrusion 41 of the bending piece member 23 position various components when the distal end portion 11 is assembled. It also has a function to perform.

  As described above, the endoscope 2 according to the present embodiment simply pushes a part of the peripheral surface of the bending piece member 23 toward the inner peripheral surface side of the protruding portion 41 having the above-described conduction function and removal prevention function. Since it is configured to be plastically deformed and to have an elastic force, the built-in material of the distal end portion 11 is not affected.

Further, as in the conventional example shown in FIG. 10, the bending piece member 62 is fixed to the distal end hard member 60 using the screw 63, but in this embodiment, the bending piece member 23 is not used without using the screw 63. Can be fixed to the distal end hard member 21, and a conduction function and a disconnection prevention function can be obtained in a space-saving manner.
As a result, the distal end hard member 21 can be reduced in diameter, and the distal end portion 11 can be reduced in diameter.

  Therefore, according to the first embodiment, the endoscope 2 that can reduce the diameter of the distal end hard member 21 and can reliably conduct the bending portion 12 to the bending piece member 23 is realized. It becomes possible.

  Moreover, when repairing the front-end | tip part 11 of the endoscope 2, the endoscope 2 of this embodiment remove | excludes the protrusion part 41 from the level | step-difference part 40, and peels an adhesive agent, and the front-end | tip hard member 23 and the bending piece member 23 can be separated. That is, since the bending piece member 23 can be easily detached from the distal end hard member 23 without requiring the work of wiping off the solder neatly with respect to the connection fixing by soldering, which was necessary in the prior art, the workability of repair is also improved. improves.

  Furthermore, since the continuity between the channel tube connecting member 22 and the bending piece member 23 can be ensured without using a fixing member such as a screw, not only the number of parts can be reduced, but also complexities such as soldering during assembly. Therefore, the manufacturing process can be simplified, and the manufacturing cost can be reduced.

(Second Embodiment)
FIG. 8 is an exploded perspective view in which the channel tube connecting member and the most advanced bending piece member of the endoscope according to the second embodiment of the present invention are disassembled, and FIG. It is an enlarged view which shows the structure. 8 and 9, the same components as those of the endoscope 2 according to the first embodiment are denoted by the same reference numerals, and the description thereof is omitted, and only different portions are described.

  The endoscope 2 according to the present embodiment is configured by providing the protruding portion in the first embodiment on the channel tube connecting member 22 and providing the stepped portion on the bending piece member 23.

  Specifically, as shown in FIG. 8, the endoscope 2 according to the present embodiment includes a channel tube connecting member 22 </ b> A having a protruding portion 44 and a bending piece member 23 </ b> A having a stepped portion 43.

  As in the first embodiment, the channel tube connecting member 22A is a conductive member whose front end is fitted and fixed in the communication hole 25 of the hard end member 21 and whose rear end is connected to the insertion channel tube 29. It is comprised by the cylinder shape using.

  And the projection part 44 of 22 A of channel tube connection members is comprised so that it may protrude to an outer peripheral surface side and may be elastically deformed to an outer peripheral surface side.

  On the other hand, similarly to the first embodiment, the bending piece member 23A is fixed to the distal end hard member 21 in a state where the channel tube connecting member 22A is housed therein, and is configured in a cylindrical shape using a conductive member. The bending piece member disposed immediately after the rear end side of the distal end hard member 21.

  And the level | step-difference part 43 of 23 A of bending piece members is provided in the one part internal peripheral surface of a longitudinal direction. The bending piece member 23A is configured such that when the channel tube connecting member 22A is housed inside and fixed to the distal end rigid member 12, the protruding portion 44 comes into contact with the stepped portion 43 and becomes conductive.

  More specifically, as shown in FIGS. 8 and 9, the protruding portion 44 of the channel tube connecting member 22 </ b> A is formed by providing a U-shaped notch in the thin portion of the channel tube connecting member 22 </ b> A, for example. , And the projecting portion 44 is plastically deformed by being drawn out to the outer peripheral surface side. The plastically deformed projecting portion 44 has an elastic force while being integrally formed with the channel tube connecting member 22A.

  On the other hand, the stepped portion 43 of the bending piece member 23A is formed in a groove shape, and is along a contact surface 43a that is a partial inner peripheral surface in the longitudinal direction and a direction orthogonal to the contact surface 43a. The wall portion 43b is formed.

  In the endoscope 2 having such a configuration, as in the first embodiment, when the bending piece member 23A is completely fitted and fixed to the rear end portion 21A of the distal end hard member 21, in the present embodiment, As shown in FIG. 9, the projection 44 of the channel tube connecting member 22A comes into contact with the contact surface 43a of the bending piece member 23A by its elastic force.

  At this time, the protrusion 44 is always urged toward the outer peripheral surface side by its elastic force, so that the contact with the contact surface 43a of the bending piece member 23A can be reliably held. That is, the conduction state between the channel tube connecting member 22A and the bending piece member 23A can be secured.

Of course, in the endoscope 2 of the present embodiment, even when the adhesive piece peels off due to aging or the like and the bending piece member 23A is detached from the distal end hard member 21 at the distal end portion 11 of the endoscope 2, the endoscope 2 of the present embodiment has a channel tube connection. Since the protruding portion 44 of the member 22A slides on the contact surface 43a and is brought into contact with and locked to the wall portion 43b of the bending piece member 23A, it is pulled out from the distal end hard member 21 of the bending piece member 23A (the distal end hard member 21). It is possible to prevent the distal end hard member 21 from moving in the rear end side direction (right direction in FIG. 9), that is, to prevent the bending piece member 23 </ b> A from coming off from the front end portion 11. This provides a function to prevent omissions.
Therefore, according to the second embodiment, the same effect as the first embodiment can be obtained.

  In the first and second embodiments, the shapes of the stepped portions 40 and 43 and the protruding portions 41 and 44 are not limited to the shapes shown in FIGS. 3 and 9, and the channel tube connecting member 22. Any shape may be used as long as the conductive state between the bending piece member 23 and the bending piece member 23 can be reliably maintained.

  For example, when it is intended to obtain only the conduction function without considering the disconnection prevention function and the positioning function, both end portions are fixed, and the central portion protrudes to the inner peripheral surface side or the outer peripheral surface side, You may comprise a protrusion part so that this center part may elastically deform.

  The endoscope of the present invention is not limited to various types of endoscopes inserted into body cavities, and in particular, nasal endoscopes that perform treatment / treatment by inserting the insertion portion nasally from the mouth or nose. If configured as a mirror, it is effective for reducing the diameter of the tip.

  As described above, according to the endoscope of each embodiment described above, the diameter of the distal end hard member can be reduced, and conduction of the bending portion to the bending piece can be performed reliably.

  The present invention is not limited to the above-described embodiments and modifications, and various changes and modifications can be made without departing from the scope of the present invention.

  This application is filed on the basis of the priority claim of Japanese Patent Application No. 2011-192866 filed in Japan on September 5, 2011, and the above disclosure is included in the present specification and claims. Shall be quoted.

Claims (9)

A leading end rigid member having a communication hole for an insertion channel and made of resin;
A channel tube connecting member configured in a cylindrical shape using a conductive member, the front end side being fitted and fixed in the communication hole of the distal end hard member, and the rear end side being connected to the insertion channel tube;
The fixed immediately after the rear end side of the distal end rigid member, and the bay Kyokukoma member configured in a cylindrical shape with an electrically conductive member in a state of accommodating the channel tube connecting member therein,
When provided on one peripheral surface of the channel tube connecting member and the bending piece member, elastically projecting toward the other peripheral surface, and when the channel tube connecting member is accommodated inside and fixed to the distal end hard member A projecting portion in contact with the other peripheral surface and conducting;
An endoscope characterized by comprising: The protrusion is provided on an inner peripheral surface of the bending piece member,
The channel tube connecting member has a step portion provided on a part of the outer peripheral surface in the longitudinal direction,
The tip of the front Symbol protrusion claim 1, characterized in that the curved piece member conducts in contact with the step portion when secured to the distal end rigid member and accommodates the channel tube connecting member to the internal The endoscope according to 1. The projecting portion, the portion of the thin portion of the bending piece member by plastically deformed by extrusion to the inner peripheral surface side, the bending piece member and claim 2, characterized in that is obtained by integrally formed The endoscope according to 1.   A notch formed in a longitudinal direction is provided on a rear end side of the distal end hard member, and the projecting portion is in contact with the stepped portion within a range in the longitudinal direction of the notch. Item 3. The endoscope according to Item 2.   3. The protrusion according to claim 2, wherein when the protruding portion comes into contact with the stepped portion, the protruding portion prevents the bending piece member from being pulled out from the distal end hard member by locking with the stepped portion. The endoscope described. Furthermore, another protrusion is provided at a position different from the protrusion on the inner peripheral surface of the bending piece member, and a groove portion that engages with the protrusion is provided on a part of the outer peripheral surface of the distal end hard member. The endoscope according to claim 2 .   The distal end hard member has an imaging device therein, and the protruding portion and the stepped portion are arranged at a position separated from the imaging device in a cross section in a direction perpendicular to the axial direction of the distal end hard portion. The endoscope according to claim 2. The protrusion is provided on the outer peripheral surface of the channel tube connecting member, and the bending piece member has a step portion provided on a part of the inner peripheral surface in the longitudinal direction, and the tip of the protrusion The endoscope according to claim 1, wherein the bending piece member is electrically connected to the stepped portion when the channel tube connecting member is accommodated inside and fixed to the distal end rigid member. .   The protruding portion is formed integrally with the channel tube connecting member by plastic deformation by pulling out a part of the thin portion of the channel tube connecting member to the outer peripheral surface side. 8. The endoscope according to 8.

Images